Include dormers the small outjuttings over attic.
How to figure out square of roof.
Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure.
You will need to express this size in terms of square feet.
Multiply the length by the width to arrive at the ground area of the house.
A square simply refers to a 10 x 10 square of roofing.
Multiply the length and width of each square or rectangle shaped plane.
This nominal square footage amount is then multiplied by a factor associated with the roof s pitch.
The first step in a free roofing estimate is measuring the roof dimensions.
Outside of the u s a degree angle is typically used.
Roof pitches in degrees.
To find the squares divide the overall roof area by 100 and then round up.
For instance if the roof is 1550 square feet then it is 16 squares.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Measure your house at ground level then add in the roof s overhang for greater accuracy.
How to calculate square feet of a roof step 1.
This is simply 100 square feet of roof.
As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house.
Measure the length and width of every roof plane or surface.